World's scariest, best water slides

(CNN) — What better way to cool off during your summer travels than taking the plunge on a water slide with speeds of up to 100 kilometers per hour?

From the Kilimanjaro in Brazil, to the Aqualoop in Mexico and the Mammoth in Indiana, here are nine of the best water slides in destinations around the world:

1. Mammoth, Holiday World & Splashin' Safari, Indiana

Mammoth is certified by the Guinness World Records as the world's longest water coaster.

ProSlide Technology Inc.

The world's first six-person water coaster covers over three acres of the Splashin' Safari park and has a length of just less than a third of a mile.

"It's powered with LIMs (linear induction motors), which is the same technology used for roller coasters and light rail transportation," explains Ruth McMahon, former director at ProSlide Technology Inc.

2. Aqualoop, Ixtapan Parque Acuatico, Mexico

The drop which follows allows them to gain enough speed -- up to 60 kilometers an hour -- to make it around the almost-vertical loop, which proved somewhat of a challenge for ride designers.

courtesy whitewaterwest.com

The Aqualoop is one of the few water slides to feature an almost vertical loop-the-loop.

Riders start by standing on a trapdoor. The drop that follows allows them to gain enough speed -- up to 60 kilometers an hour -- to make it around the loop.

"With the unique slide path, we had to optimize the shape of the loop to maximize the range of riders that could use it while making sure no one got stuck," says Bruce Bradley, senior engineering specialist at WhiteWater West theme park designers.

Considering the transparency of the slide, that could certainly prove to be embarrassing.

The park is located about 90 minutes by highway (106 kilometers) southwest of Mexico City.